15+ years • 6,500+ jobs completed • 1,500+ Oklahoma homes served
★ HAPPY 4TH OF JULY ★
July 4th in Oklahoma means a full house, a hot kitchen, and the AC running flat out. Before the cookout, let me make sure yours can keep up. I hold same-day spots open for no-cool calls across Kingfisher and Central Oklahoma, and new-system estimates are always free. $99 dispatch, $111 diagnostic on repairs. 4.8 stars, 290+ reviews. Happy Independence Day from my family to yours. Call 405-375-4822 or book at hartzellsheatair.com.
Whole-Home Humidifier and Dehumidifier in Central Oklahoma
Oklahoma winters are brutal on wood floors and furniture. When I walk into a home in January and see gaps opening up between hardwood planks or doors that have shrunk enough to let light through at the frame, I know the interior humidity has been running below 25 percent for months. A whole-home humidifier installed on the furnace solves this problem permanently. I have been installing AprilAire systems across central Oklahoma for 45 years.
Summer in central Oklahoma is the opposite problem. 70-80 percent outdoor humidity means basements get damp, crawlspaces grow mold, and the air conditioning system has to work much harder than it should. A ducted whole-home dehumidifier handles humidity in the spring and fall when temperatures do not require much cooling, and it protects your home structure year-round.
Whole-Home Humidity Control Pricing
Bypass Humidifier Pad/Media Replacement
$195
Annual maintenance for AprilAire 400/500 series
Bypass Humidifier Service/Repair
$295
Includes cleaning, inspection, solenoid test
Bypass Humidifier Install Customer-Supplied
$645
Labor only, you supply the unit
AprilAire 400/500 Series Bypass Install
$995
Supply and install, whole-home bypass up to 4,000 sq ft
AprilAire 600/700 Fan-Powered Install
$1,295
Fan-powered, works with AC off, better coverage
AprilAire 800 Series Steam Install
$2,195
Electrode steam, no furnace heat required
Whole-Home Dehumidifier 70 Pint Install
$2,295
Ducted whole-home dehumidification
Whole-Home Dehumidifier 90+ Pint Install
$2,895
Large homes or high-moisture environments
Dehumidifier Service and Drain Line Clean
$245
Annual cleaning, filter check, drain test
Humidistat Replace and Recalibrate
$245
Digital or manual humidistat replacement
Humidifier Types: Which One Is Right for You?
Bypass humidifier (AprilAire 400/500, $995 installed): Best for homes up to about 3,500 square feet with a standard gas furnace. Works only when the furnace is running.
Fan-powered humidifier (AprilAire 600/700, $1,295 installed): Works independently of the furnace cycle. Better humidity control in larger homes or homes that do not run the furnace frequently.
Steam humidifier (AprilAire 800, $2,195 installed): Generates steam electrically, completely independent of the furnace. The most consistent and controllable option. Best for larger homes, homes with heat pumps, or homes where precise humidity control matters.
Cracked wood floors or sticky summer air? Call 405-375-4822. Free estimates on new installations.
Frequently Asked Questions
Why is humidity control important in central Oklahoma?
Oklahoma has two humidity problems that are essentially opposites. In winter, interior relative humidity in central Oklahoma homes routinely drops to 20-30 percent, causing cracked wood floors, split door frames, static electricity, bloody noses, and increased susceptibility to respiratory illness. In summer, outdoor humidity runs 70-90 percent on many days, causing moisture intrusion in basements and mold growth.
What is the difference between a bypass humidifier and a fan-powered humidifier?
A bypass humidifier uses the furnace blower to push air through a water-saturated pad. It only works when the furnace is running. A fan-powered humidifier has its own built-in fan, so it can add humidity independently of the furnace cycle. Fan-powered models handle larger homes more effectively. The AprilAire 600/700 series fan-powered models run $1,295 installed vs $995 for a bypass model.
When do I need a whole-home dehumidifier instead of just running the AC?
Your air conditioner dehumidifies as a side effect of cooling. But in spring and fall when temperatures are mild and you do not need much cooling, the AC runs infrequently and humidity climbs. A standalone whole-home dehumidifier runs independently of the AC and maintains a set humidity level year-round. Starting at $2,295 for a 70-pint ducted unit.
What humidity level should I set my humidifier to in Oklahoma winters?
For central Oklahoma winters, I recommend targeting 35-40 percent relative humidity indoors. Below 30 percent you will notice dry skin, static, and wood shrinkage. Above 50 percent in winter you risk condensation on windows and potential moisture problems in wall cavities.
Does a whole-home humidifier require maintenance?
Yes. Bypass and fan-powered humidifiers use a water panel media pad that accumulates mineral deposits from the water supply. It should be replaced every 1-2 seasons depending on your water hardness. Kingfisher County has moderately hard water, so annual replacement is typical. The pad swap runs $195.
Do you charge a dispatch and diagnostic fee for humidifier calls?
Yes. There is a $99 dispatch fee for all service calls. If we are diagnosing a humidifier malfunction, the $111 The $111 diagnostic is part of the $210 flat repair-call price. Accept the estimate within 10 days and I give the $99 dispatch back. New installation quotes are free.
Serving Central Oklahoma Including:
Ready to Schedule? Call or Book Online.
Call 405-375-4822 or book online. Same-day appointments available when the schedule allows.
9 dispatch fee applies to all service calls. 11 The $111 diagnostic is part of the $210 flat repair-call price. Accept the estimate within 10 days and I give the $99 dispatch back.
2026 IAQ Pricing (Whole-Home Options)
- Whole-home UV air purifier $750 installed. Kills mold, bacteria, viruses at the air handler.
- Whole-home steam humidifier $998 installed. Real humidity control through dry Oklahoma winters.
- Whole-home dehumidifier $2,295 (70 pint) or $2,895 (90 pint+). Premium tier for tight homes or high-humidity zones.
- AprilAire bypass humidifier $645 to $2,195 depending on model and capacity.
Often added when blower or evaporator is already open on another service call. Call 405-375-4822 for whole-home IAQ design.